AimSealBio is a novel technique which stimulates the periradicular cells to deposit a biological barrier at the root apex by inducing healing and regeneration. This clinical trial was undertaken to compare the outcome of teeth treated with the SealBio and the obturation technique.Materials and methodsThirty patients met the inclusion criteria and consented to participate in the study. Patients were randomly assigned to the SealBio and the obturation group. The time taken for both the techniques and periapical healing was evaluated. The patients of both the groups were evaluated at 6, 12, and 18 months follow up. The periapical index (PAI) was the primary outcome measure to check the apical bone density and healing. The secondary outcome measure was the presence/absence of signs and symptoms. The final outcome measure was the sum of the primary and secondary outcome measures.Results and conclusionThe time taken to perform endodontic treatment with the SealBio technique was significantly lesser than that of obturation. Both groups showed equally favorable outcomes at the end of 18 months without any statistically significant differences.Clinical significanceThe results of the present study have demonstrated that SealBio technique gives similar results as that of conventional gutta-percha obturation. The shortcomings of obturation such as difficulty in obtaining a fluid-tight seal and difficulty in obturating tortuous canals can be overcome by the SealBio method. The SealBio method is cost effective, less technique sensitive, and takes lesser chair time.How to cite this articleJha P, Virdi MS, et al. A Regenerative Approach for Root Canal Treatment of Mature Permanent Teeth: Comparative Evaluation with 18 Months Follow-up. Int J Clin Pediatr Dent 2019;12(3):182–188.
The main aim of this study was to investigate the temporal trends in maximum (T max ), minimum (T min ) temperature and diurnal temperature range (DTR) at annual and seasonal basis for seven sites in north-west region of India. The analysis was carried out for period of 31 years . The magnitude of trends and their significance were determined using Sen's slope and Mann-Kendall methods. Additionally, persistence analysis of annual average DTR and mean temperature (T mean ) has been carried out using cumulative annual mean (CAM) method. It is clear from the results that during last three decades the majority of sites showed decrease/(increases) in DTR/(T min ) trends for seasonal and annual time scale. While, trends in annual and seasonal T max were observed insignificant. CAM analysis demonstrated that T mean has increased consistently since 1987-1988 onwards at majority of the sites. Further, correlation analysis revealed that rainfall along with potential evapotranspiration may be one of the important reasons for observed DTR decrease.
Summary
A complex slowness vector governs the three-dimensional propagation of harmonic plane waves in a dissipative elastic medium with general anisotropy. In any sagittal plane, this dual vector is specified with phase direction, propagation velocity and coefficients for attenuation. A generalised reflection phenomenon is illustrated for incidence of inhomogeneous waves at the stress free boundary of the medium. Each reflected wave at the boundary is characterised by its propagation direction, propagation velocity, inhomogeneity, amplitude ratio, phase shift and energy flux. These propagation characteristics are exhibited graphically for a numerical example of anisotropic viscoelastic medium.
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